org.teiid.query.function

Interface FunctionMetadataSource

All Known Implementing Classes:

SystemSource, UDFSource

public interface FunctionMetadataSource

A FunctionMetadataSource represents a source of function metadata for the function library. A FunctionMetadataSource needs to know how to return a collection of all the function signatures it knows about.

Method Summary

Modifier and Type	Method and Description
ClassLoader	getClassLoader() Classloader used for functions
Collection<FunctionMethod>	getFunctionMethods() This method requests that the source return all FunctionMethods the source knows about.
Class<?>	getInvocationClass(String className) This method determines where the invocation classes specified in the function metadata are actually retrieved from.

Method Detail

getFunctionMethods

Collection<FunctionMethod> getFunctionMethods()

This method requests that the source return all FunctionMethods the source knows about. This can occur in several situations - on initial registration with the FunctionLibraryManager, on a general reload, etc. This may be called multiple times and should always return the newest information available.

Returns:

Collection of FunctionMethod objects

getInvocationClass

Class<?> getInvocationClass(String className)
                     throws ClassNotFoundException

This method determines where the invocation classes specified in the function metadata are actually retrieved from.

Parameters:

className - Name of class

Returns:

Class reference

Throws:

ClassNotFoundException - If class could not be found

getClassLoader

ClassLoader getClassLoader()

Classloader used for functions

Returns: